Originally Posted by Neem
I Will drive stock classe. With a speedpassion 13,5t with Max ratio of 1:4,5. Most off time outdoor asphalt track.
And also at a carpet indoor track
Is the spur gear that comes with the kit 48dp or 64dp?
The Kit comes with 48dp 84t spur gear. For 4.5 fdr I would toss in a 64dp 100t spur with a 42t pinion.
The Mazdaspeed6 body should be a safe starting point.
Because you are running both asphalt and carpet I would get the full range of xray springs for the car. Two sets each to keep your tuning window open. That may seem overkill but asphalt and carpet, low or high grip can use very different springs. There are other spring kits available but I would stick with xray springs in order to be able to relate to most setups that people post.
I wouldn't add any option parts to the car out of the box. Just drive it and save the money for later when you have more experience with it to decide if you need anything else on it.